supported by Apache HTTPd's `mod_include`:
http://web.archive.org/web/19971210170837/http://hoohoo.ncsa.uiuc.edu/docs/tutorials/includes.html
- http://httpd.apache.org/docs/current/mod/mod_include.html
+ http://httpd.apache.org/docs/2.2/mod/mod_include.html
ssic uses the `CGI::SSI` Perl module for directive processing.
<!--#endif -->
The following example checks the SSI interpreter and uses the correct
-expression syntax for either ssic or Apache HTTPd 2.2 `mod_include`:
+expression syntax for either ssic or `mod_include` from Apache HTTPd 2.2
+or earlier:
<!--#if expr="'$__SSIC__' eq '__SSIC__'" -->
<!-- Apache HTTPd 2.2 mod_include -->